What is CVE-2021-21491?

CVE-2021-21491 is a medium-severity vulnerability in SAP Netweaver Application Server Java, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-03-10.

How severe is CVE-2021-21491?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in SAP Netweaver Application Server Java

CVE-2021-21491

SAP Netweaver Application Server Java (Applications based on WebDynpro Java) versions 7.00, 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, allow an attacker to redirect users to a malicious site due to Reverse Tabnabbing vulnerabilities.

Vulnerability class: Open Redirect

EPSS: 0.007 (48.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Sap Netweaver_application_server_java — versions 7.00, 7.10, 7.11
Sap Se Netweaver Application Server Java (Applications Based On Web Dynpro Java) — versions < 7.00, < 7.10, < 7.11

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

cna@sap.com (x_refsource_MISC, Vendor Advisory)
cna@sap.com (Permissions Required, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-21491?: CVE-2021-21491 is a medium-severity vulnerability in SAP Netweaver Application Server Java, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-03-10.
How severe is CVE-2021-21491?: Medium severity. CVSS v3 base score is 6.1 out of 10.